文献类型：期刊文献

英文题名：Modelling of breakage rate and bubble size distribution in bubble columns accounting for bubble shape variations

作者：Shi, Weibin[1];Yang, Jie[2];Li, Guang[1];Yang, Xiaogang[1];Zong, Yuan[3];Cai, Xinyue[1]

机构：[1]Univ Nottingham Ningbo China, Dept Mech Mat & Mfg Engn, Univ Pk, Ningbo 315100, Zhejiang, Peoples R China;[2]Univ Nottingham Ningbo China, Sch Math Sci, Univ Pk, Ningbo 315100, Zhejiang, Peoples R China;[3]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2018

卷号：187

起止页码：391

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20182005205284);WOS:【SCI-EXPANDED(收录号:WOS:000436773400034)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 91534118, 21761132026). Weibin Shi and Xinyue Cai would also like to acknowledge the Ph.D. scholarship of the International Doctoral Innovation Centre (IDIC) of the University of Nottingham Ningbo China and the support of EPSRC (Grant no. EP/G037345/1).

语种：英文

外文关键词：CFD simulation; Bubble column; Breakup model; Bubble shapes; Breakage criterion

摘要：In the study of meso-scale structures of multi-phase flow in bubble columns, accurate modelling of the interaction between the turbulence eddies and particle/bubble groups is crucial for capturing the heat and mass transfer occurring between the bubbles and surrounding carrier fluid. This work focuses on the influence of bubble shape variations on bubble breakage due to the eddy collision with the bubbles in bubble column flows. An improved breakage model accounting for the variation of bubble shapes was proposed. The improved breakage model coupled with the widely adopted isotropic, homogeneous turbulence kinetic energy spectrums, that are currently available from the open literature, takes into account the different energy requirements in forming the daughter bubbles, i.e. the increase of in surface energy and the pressure head difference of the bubble and its surrounding turbulent eddies. The simulation results compared with experimental data have clearly demonstrated that the improved model effectively describes the various shapes of bubble breakage events, which may consequently have a strong impact on the interfacial area estimation that is crucial for calculation of the transfer rates of mass and heat transfer in the bubble columns. (C) 2018 Elsevier Ltd. All rights reserved.